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Institution

University of Saskatchewan

EducationSaskatoon, Saskatchewan, Canada
About: University of Saskatchewan is a education organization based out in Saskatoon, Saskatchewan, Canada. It is known for research contribution in the topics: Population & Health care. The organization has 25021 authors who have published 52579 publications receiving 1483049 citations. The organization is also known as: USask.


Papers
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Journal ArticleDOI
TL;DR: A practical difficulty with the Marlowe-Crowne Social Desirability Scale (SDS) is its length, and researchers have devised a number of short forms of SDS as mentioned in this paper.
Abstract: A practical difficulty with the Marlowe-Crowne Social Desirability Scale (SDS) is its length. Preferring a shorter measure of social desirability, researchers have devised a number of short forms o...

567 citations

Journal ArticleDOI
05 May 2005-Nature
TL;DR: The sequence and preliminary characterization of a protein that is a cadmium-containing carbonic anhydrase from the marine diatom Thalassiosira weissflogii is presented, and this discovery provides a long-awaited explanation for the nutrient-like behaviour of Cadmium in the oceans.
Abstract: The ocean biota contains a vast reservoir of genomic diversity. Here we present the sequence and preliminary characterization of a protein that is a cadmium-containing carbonic anhydrase from the marine diatom Thalassiosira weissflogii. The existence of a cadmium enzyme in marine phytoplankton may indicate that there is a unique selection pressure for metalloenzymes in the marine environment, and our discovery provides a long-awaited explanation for the nutrient-like behaviour of cadmium in the oceans.

562 citations

Journal ArticleDOI
TL;DR: Property of feed that place constraints on microbial attachment and biofilm formation can have a profound effect on both the rate and extent of feed digestion in the rumen, and developments in feed processing, plant breeding, and genetic engineering that overcome these constraints could substantially benefit ruminant production.
Abstract: Direct microscopic examination of the rumen and its contents shows microbial populations largely attached to feed particles in the digesta Most feeds contain a surface layer that is resistant to attachment and therefore to digestion Infiltration of these recalcitrant epidermal layers through damage sites or through focused enzymatic attack is essential for initiation of the digestive process Proliferation of primary colonizing cells produces glycocalyx-enclosed microcolonies Secondary colonizers from the ruminal fluid associate with microcolonies, resulting in the formation of multispecies microbial biofilms These metabolically related organisms associate with their preferred substrates and produce the myriad of enzymes necessary for the digestion of chemically and structurally complex plant tissues Upon accessing the internal, enzyme-susceptible tissues, microbial "digestive consortia" attach to a variety of nutrients, including protein, cellulose, and starch and digest insoluble feed materials from the inside out Substances that prevent microbial attachment or promote detachment (eg, condensed tannins, methylcellulose) can completely inhibit cellulose digestion As the microbial consortium matures and adapts to a particular type of feed, it becomes inherently stable and its participant microorganisms are notoriously difficult to manipulate due to the impenetrable nature of biofilms Properties of feed that place constraints on microbial attachment and biofilm formation can have a profound effect on both the rate and extent of feed digestion in the rumen Developments in feed processing (ie, chemical and physical), plant breeding, and genetic engineering (both of ruminal microorganisms and plants) that overcome these constraints through the promotion of microbial attachment and biofilm formation could substantially benefit ruminant production

562 citations

Book ChapterDOI
TL;DR: This chapter discusses the development of competition theory, which has traditionally included three stages: inferences drawn from observation of natural populations, construction of mathematical models, and laboratory experiments designed to test elements of competitive interactions in controlled environments.
Abstract: Publisher Summary This chapter discusses the development of competition theory, which has traditionally included three stages: inferences drawn from observation of natural populations, construction of mathematical models, and laboratory experiments designed to test elements of competitive interactions in controlled environments. Interference to any activity either directly or indirectly limits a competitor's access to a necessary resource or requirement. Different types of evidence are assigned for competition in nature. Principal categories are mutually exclusive spatial distributions without supporting evidence of a competitive interaction, observed or inferred ecological displacement in sympatric populations, and induced changes in distribution pattern. A considerable amount of ambiguity exists in interpretations of the results of interspecies competition. It is necessary to distinguish between maximum exploitation of the available resources by one species, and equitable utilization of the resources and possible coexistence in a mixed species system. The chapter suggests two major sources of species diversity. When competition is primarily through exploitation and the system is under strong environmental control, it is likely that fluctuations in factors affecting reproduction and survival will continually alter the outcome of the competitive interaction, allowing coexistence of mixed species populations.

562 citations

Book
24 Jul 2012
TL;DR: This paper explains the nature of each of the previous challenges to the implementation of unsaturated soil mechanics, and the determination of indirect techniques for the estimation of uns saturated soil property functions.
Abstract: Unsaturated soil mechanics has rapidly become a part of geotechnical engineering practice as a result of solutions that have emerged to a number of key problems (or challenges). The solutions have emerged from numerous research studies focusing on issues that have a hindrance to the usage of unsaturated soil mechanics. The primary challenges to the implementation of unsaturated soil mechanics can be stated as follows: (1) The need to understand the fundamental, theoretical behavior of an unsaturated soil; (2) the formulation of suitable constitutive equations and the testing for uniqueness of proposed constitutive relationships; (3) the ability to formulate and solve one or more nonlinear partial differential equations using numerical methods; (4) the determination of indirect techniques for the estimation of unsaturated soil property functions, and (5) in situ and laboratory devices for the measurement of a wide range of soil suctions. This paper explains the nature of each of the previous challenges and...

562 citations


Authors

Showing all 25277 results

NameH-indexPapersCitations
Tomas Hökfelt158103395979
Frederick Wolfe119417101272
Christopher G. Goetz11665159510
John P. Giesy114116262790
Helmut Kettenmann10438040211
Paul M. O'Byrne10460556520
Susan S. Taylor10451842108
Keith A. Hobson10365341300
Mark S. Tremblay10054143843
James F. Fries10036983589
Gordon McKay9766161390
Jonathan D. Adachi9658931641
Wenjun Zhang9697638530
William C. Dement9634043014
Chris Ryan9597134388
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
2023173
2022350
20213,129
20202,913
20192,665
20182,479